react-diagrams/diagrams-demo-gallery/demos/demo-locks/index.tsx

import * as React from 'react';
import createEngine, { DiagramModel, DefaultNodeModel } from '@projectstorm/react-diagrams';
import { CanvasWidget } from '@projectstorm/react-canvas-core';
import { DemoCanvasWidget } from '../helpers/DemoCanvasWidget';

/**
 *
 * Shows how you can lock down the system so that the entire scene cant be interacted with.
 *
 * @Author Dylan Vorster
 */
export default () => {
	//1) setup the diagram engine
	var engine = createEngine();

	var model = new DiagramModel();

	// sample for link with simple line (no additional points)
	var node1 = new DefaultNodeModel('Node 1', 'rgb(0,192,255)');
	var port1 = node1.addOutPort('Out');
	node1.setPosition(100, 100);

	var node2 = new DefaultNodeModel('Node 2', 'rgb(192,255,0)');
	var port2 = node2.addInPort('In');
	node2.setPosition(400, 100);

	let link1 = port1.link(port2);

	model.addAll(node1, node2, link1);

	// sample for link with complex line (additional points)
	var node3 = new DefaultNodeModel('Node 3', 'rgb(0,192,255)');
	var port3 = node3.addOutPort('Out');
	node3.setPosition(100, 250);

	var node4 = new DefaultNodeModel('Node 4', 'rgb(192,255,0)');
	var port4 = node4.addInPort('In');
	node4.setPosition(400, 250);

	var link2 = port3.link(port4);

	link2.point(350, 225);
	link2.point(200, 225);

	model.addAll(node3, node4, link2);

	engine.setModel(model);

	//!========================================= <<<<<<<

	model.setLocked(true);

	//!=========================================  <<<<<<<

	return (
		<DemoCanvasWidget>
			<CanvasWidget engine={engine} />
		</DemoCanvasWidget>
	);
};